const path = require('node:path');
const fs = require('fs-extra');
const yaml = require('js-yaml');
const chalk = require('chalk');
const inquirer = require('inquirer');
const { getProjectRoot, getModulePath } = require('../../../lib/project-root');
const { CLIUtils } = require('../../../lib/cli-utils');

class ConfigCollector {
  constructor() {
    this.collectedConfig = {};
    this.existingConfig = null;
    this.currentProjectDir = null;
  }

  /**
   * Find the bmad installation directory in a project
   * V6+ installations can use ANY folder name but ALWAYS have _cfg/manifest.yaml
   * @param {string} projectDir - Project directory
   * @returns {Promise<string>} Path to bmad directory
   */
  async findBmadDir(projectDir) {
    // Check if project directory exists
    if (!(await fs.pathExists(projectDir))) {
      // Project doesn't exist yet, return default
      return path.join(projectDir, 'bmad');
    }

    // V6+ strategy: Look for ANY directory with _cfg/manifest.yaml
    // This is the definitive marker of a V6+ installation
    try {
      const entries = await fs.readdir(projectDir, { withFileTypes: true });
      for (const entry of entries) {
        if (entry.isDirectory()) {
          const manifestPath = path.join(projectDir, entry.name, '_cfg', 'manifest.yaml');
          if (await fs.pathExists(manifestPath)) {
            // Found a V6+ installation
            return path.join(projectDir, entry.name);
          }
        }
      }
    } catch {
      // Ignore errors, fall through to default
    }

    // No V6+ installation found, return default
    // This will be used for new installations
    return path.join(projectDir, 'bmad');
  }

  /**
   * Detect the existing BMAD folder name in a project
   * @param {string} projectDir - Project directory
   * @returns {Promise<string|null>} Folder name (just the name, not full path) or null if not found
   */
  async detectExistingBmadFolder(projectDir) {
    // Check if project directory exists
    if (!(await fs.pathExists(projectDir))) {
      return null;
    }

    // Look for ANY directory with _cfg/manifest.yaml
    try {
      const entries = await fs.readdir(projectDir, { withFileTypes: true });
      for (const entry of entries) {
        if (entry.isDirectory()) {
          const manifestPath = path.join(projectDir, entry.name, '_cfg', 'manifest.yaml');
          if (await fs.pathExists(manifestPath)) {
            // Found a V6+ installation, return just the folder name
            return entry.name;
          }
        }
      }
    } catch {
      // Ignore errors
    }

    return null;
  }

  /**
   * Load existing config if it exists from module config files
   * @param {string} projectDir - Target project directory
   */
  async loadExistingConfig(projectDir) {
    this.existingConfig = {};

    // Check if project directory exists first
    if (!(await fs.pathExists(projectDir))) {
      return false;
    }

    // Find the actual bmad directory (handles custom folder names)
    const bmadDir = await this.findBmadDir(projectDir);

    // Check if bmad directory exists
    if (!(await fs.pathExists(bmadDir))) {
      return false;
    }

    // Dynamically discover all installed modules by scanning bmad directory
    // A directory is a module ONLY if it contains a config.yaml file
    let foundAny = false;
    const entries = await fs.readdir(bmadDir, { withFileTypes: true });

    for (const entry of entries) {
      if (entry.isDirectory()) {
        const moduleConfigPath = path.join(bmadDir, entry.name, 'config.yaml');
        if (await fs.pathExists(moduleConfigPath)) {
          try {
            const content = await fs.readFile(moduleConfigPath, 'utf8');
            const moduleConfig = yaml.load(content);
            if (moduleConfig) {
              this.existingConfig[entry.name] = moduleConfig;
              foundAny = true;
            }
          } catch {
            // Ignore parse errors for individual modules
          }
        }
      }
    }

    if (foundAny) {
      console.log(chalk.cyan('\n📋 Found existing BMAD module configurations'));
    }

    return foundAny;
  }

  /**
   * Collect configuration for all modules
   * @param {Array} modules - List of modules to configure (including 'core')
   * @param {string} projectDir - Target project directory
   * @param {Object} options - Additional options
   * @param {Map} options.customModulePaths - Map of module ID to source path for custom modules
   */
  async collectAllConfigurations(modules, projectDir, options = {}) {
    // Store custom module paths for use in collectModuleConfig
    this.customModulePaths = options.customModulePaths || new Map();
    await this.loadExistingConfig(projectDir);

    // Check if core was already collected (e.g., in early collection phase)
    const coreAlreadyCollected = this.collectedConfig.core && Object.keys(this.collectedConfig.core).length > 0;

    // If core wasn't already collected, include it
    const allModules = coreAlreadyCollected ? modules.filter((m) => m !== 'core') : ['core', ...modules.filter((m) => m !== 'core')];

    // Store all answers across modules for cross-referencing
    if (!this.allAnswers) {
      this.allAnswers = {};
    }

    for (const moduleName of allModules) {
      await this.collectModuleConfig(moduleName, projectDir);
    }

    // Add metadata
    this.collectedConfig._meta = {
      version: require(path.join(getProjectRoot(), 'package.json')).version,
      installDate: new Date().toISOString(),
      lastModified: new Date().toISOString(),
    };

    return this.collectedConfig;
  }

  /**
   * Collect configuration for a single module (Quick Update mode - only new fields)
   * @param {string} moduleName - Module name
   * @param {string} projectDir - Target project directory
   * @param {boolean} silentMode - If true, only prompt for new/missing fields
   * @returns {boolean} True if new fields were prompted, false if all fields existed
   */
  async collectModuleConfigQuick(moduleName, projectDir, silentMode = true) {
    this.currentProjectDir = projectDir;

    // Load existing config if not already loaded
    if (!this.existingConfig) {
      await this.loadExistingConfig(projectDir);
    }

    // Initialize allAnswers if not already initialized
    if (!this.allAnswers) {
      this.allAnswers = {};
    }

    // Load module's install config schema
    // First, try the standard src/modules location
    let installerConfigPath = path.join(getModulePath(moduleName), '_module-installer', 'module.yaml');
    let moduleConfigPath = path.join(getModulePath(moduleName), 'module.yaml');

    // If not found in src/modules, we need to find it by searching the project
    if (!(await fs.pathExists(installerConfigPath)) && !(await fs.pathExists(moduleConfigPath))) {
      // Use the module manager to find the module source
      const { ModuleManager } = require('../modules/manager');
      const moduleManager = new ModuleManager();
      const moduleSourcePath = await moduleManager.findModuleSource(moduleName);

      if (moduleSourcePath) {
        installerConfigPath = path.join(moduleSourcePath, '_module-installer', 'module.yaml');
        moduleConfigPath = path.join(moduleSourcePath, 'module.yaml');
      }
    }

    let configPath = null;
    let isCustomModule = false;

    if (await fs.pathExists(moduleConfigPath)) {
      configPath = moduleConfigPath;
    } else if (await fs.pathExists(installerConfigPath)) {
      configPath = installerConfigPath;
    } else {
      // Check if this is a custom module with custom.yaml
      const { ModuleManager } = require('../modules/manager');
      const moduleManager = new ModuleManager();
      const moduleSourcePath = await moduleManager.findModuleSource(moduleName);

      if (moduleSourcePath) {
        const rootCustomConfigPath = path.join(moduleSourcePath, 'custom.yaml');
        const moduleInstallerCustomPath = path.join(moduleSourcePath, '_module-installer', 'custom.yaml');

        if ((await fs.pathExists(rootCustomConfigPath)) || (await fs.pathExists(moduleInstallerCustomPath))) {
          isCustomModule = true;
          // For custom modules, we don't have an install-config schema, so just use existing values
          // The custom.yaml values will be loaded and merged during installation
        }
      }

      // No config schema for this module - use existing values
      if (this.existingConfig && this.existingConfig[moduleName]) {
        if (!this.collectedConfig[moduleName]) {
          this.collectedConfig[moduleName] = {};
        }
        this.collectedConfig[moduleName] = { ...this.existingConfig[moduleName] };
      }
      return false;
    }

    const configContent = await fs.readFile(configPath, 'utf8');
    const moduleConfig = yaml.load(configContent);

    if (!moduleConfig) {
      return false;
    }

    // Compare schema with existing config to find new/missing fields
    const configKeys = Object.keys(moduleConfig).filter((key) => key !== 'prompt');
    const existingKeys = this.existingConfig && this.existingConfig[moduleName] ? Object.keys(this.existingConfig[moduleName]) : [];

    const newKeys = configKeys.filter((key) => {
      const item = moduleConfig[key];
      // Check if it's a config item and doesn't exist in existing config
      return item && typeof item === 'object' && item.prompt && !existingKeys.includes(key);
    });

    // If in silent mode and no new keys, use existing config and skip prompts
    if (silentMode && newKeys.length === 0) {
      if (this.existingConfig && this.existingConfig[moduleName]) {
        if (!this.collectedConfig[moduleName]) {
          this.collectedConfig[moduleName] = {};
        }
        this.collectedConfig[moduleName] = { ...this.existingConfig[moduleName] };

        // Special handling for user_name: ensure it has a value
        if (
          moduleName === 'core' &&
          (!this.collectedConfig[moduleName].user_name || this.collectedConfig[moduleName].user_name === '[USER_NAME]')
        ) {
          this.collectedConfig[moduleName].user_name = this.getDefaultUsername();
        }

        // Also populate allAnswers for cross-referencing
        for (const [key, value] of Object.entries(this.existingConfig[moduleName])) {
          // Ensure user_name is properly set in allAnswers too
          let finalValue = value;
          if (moduleName === 'core' && key === 'user_name' && (!value || value === '[USER_NAME]')) {
            finalValue = this.getDefaultUsername();
          }
          this.allAnswers[`${moduleName}_${key}`] = finalValue;
        }
      } else if (moduleName === 'core') {
        // No existing core config - ensure we at least have user_name
        if (!this.collectedConfig[moduleName]) {
          this.collectedConfig[moduleName] = {};
        }
        if (!this.collectedConfig[moduleName].user_name) {
          this.collectedConfig[moduleName].user_name = this.getDefaultUsername();
          this.allAnswers[`${moduleName}_user_name`] = this.getDefaultUsername();
        }
      }
      // Show "no config" message for modules with no new questions
      CLIUtils.displayModuleNoConfig(moduleName, moduleConfig.header, moduleConfig.subheader);
      return false; // No new fields
    }

    // If we have new fields, build questions first
    if (newKeys.length > 0) {
      const questions = [];
      for (const key of newKeys) {
        const item = moduleConfig[key];
        const question = await this.buildQuestion(moduleName, key, item, moduleConfig);
        if (question) {
          questions.push(question);
        }
      }

      if (questions.length > 0) {
        // Only show header if we actually have questions
        CLIUtils.displayModuleConfigHeader(moduleName, moduleConfig.header, moduleConfig.subheader);
        console.log(); // Line break before questions
        const answers = await inquirer.prompt(questions);

        // Store answers for cross-referencing
        Object.assign(this.allAnswers, answers);

        // Process answers and build result values
        for (const key of Object.keys(answers)) {
          const originalKey = key.replace(`${moduleName}_`, '');
          const item = moduleConfig[originalKey];
          const value = answers[key];

          let result;
          if (Array.isArray(value)) {
            result = value;
          } else if (item.result) {
            result = this.processResultTemplate(item.result, value);
          } else {
            result = value;
          }

          if (!this.collectedConfig[moduleName]) {
            this.collectedConfig[moduleName] = {};
          }
          this.collectedConfig[moduleName][originalKey] = result;
        }
      } else {
        // New keys exist but no questions generated - show no config message
        CLIUtils.displayModuleNoConfig(moduleName, moduleConfig.header, moduleConfig.subheader);
      }
    }

    // Copy over existing values for fields that weren't prompted
    if (this.existingConfig && this.existingConfig[moduleName]) {
      if (!this.collectedConfig[moduleName]) {
        this.collectedConfig[moduleName] = {};
      }
      for (const [key, value] of Object.entries(this.existingConfig[moduleName])) {
        if (!this.collectedConfig[moduleName][key]) {
          this.collectedConfig[moduleName][key] = value;
          this.allAnswers[`${moduleName}_${key}`] = value;
        }
      }
    }

    return newKeys.length > 0; // Return true if we prompted for new fields
  }

  /**
   * Process a result template with value substitution
   * @param {*} resultTemplate - The result template
   * @param {*} value - The value to substitute
   * @returns {*} Processed result
   */
  processResultTemplate(resultTemplate, value) {
    let result = resultTemplate;

    if (typeof result === 'string' && value !== undefined) {
      if (typeof value === 'string') {
        result = result.replace('{value}', value);
      } else if (typeof value === 'boolean' || typeof value === 'number') {
        if (result === '{value}') {
          result = value;
        } else {
          result = result.replace('{value}', value);
        }
      } else {
        result = value;
      }

      if (typeof result === 'string') {
        result = result.replaceAll(/{([^}]+)}/g, (match, configKey) => {
          if (configKey === 'project-root') {
            return '{project-root}';
          }
          if (configKey === 'value') {
            return match;
          }

          let configValue = this.allAnswers[configKey] || this.allAnswers[`${configKey}`];
          if (!configValue) {
            for (const [answerKey, answerValue] of Object.entries(this.allAnswers)) {
              if (answerKey.endsWith(`_${configKey}`)) {
                configValue = answerValue;
                break;
              }
            }
          }

          if (!configValue) {
            for (const mod of Object.keys(this.collectedConfig)) {
              if (mod !== '_meta' && this.collectedConfig[mod] && this.collectedConfig[mod][configKey]) {
                configValue = this.collectedConfig[mod][configKey];
                if (typeof configValue === 'string' && configValue.includes('{project-root}/')) {
                  configValue = configValue.replace('{project-root}/', '');
                }
                break;
              }
            }
          }

          return configValue || match;
        });
      }
    }

    return result;
  }

  /**
   * Get the default username from the system
   * @returns {string} Capitalized username\
   */
  getDefaultUsername() {
    let result = 'BMad';
    try {
      const os = require('node:os');
      const userInfo = os.userInfo();
      if (userInfo && userInfo.username) {
        const username = userInfo.username;
        result = username.charAt(0).toUpperCase() + username.slice(1);
      }
    } catch {
      // Do nothing, just return 'BMad'
    }
    return result;
  }

  /**
   * Collect configuration for a single module
   * @param {string} moduleName - Module name
   * @param {string} projectDir - Target project directory
   * @param {boolean} skipLoadExisting - Skip loading existing config (for early core collection)
   * @param {boolean} skipCompletion - Skip showing completion message (for early core collection)
   */
  async collectModuleConfig(moduleName, projectDir, skipLoadExisting = false, skipCompletion = false) {
    this.currentProjectDir = projectDir;
    // Load existing config if needed and not already loaded
    if (!skipLoadExisting && !this.existingConfig) {
      await this.loadExistingConfig(projectDir);
    }

    // Initialize allAnswers if not already initialized
    if (!this.allAnswers) {
      this.allAnswers = {};
    }
    // Load module's config
    // First, check if we have a custom module path for this module
    let installerConfigPath = null;
    let moduleConfigPath = null;

    if (this.customModulePaths && this.customModulePaths.has(moduleName)) {
      const customPath = this.customModulePaths.get(moduleName);
      installerConfigPath = path.join(customPath, '_module-installer', 'module.yaml');
      moduleConfigPath = path.join(customPath, 'module.yaml');
    } else {
      // Try the standard src/modules location
      installerConfigPath = path.join(getModulePath(moduleName), '_module-installer', 'module.yaml');
      moduleConfigPath = path.join(getModulePath(moduleName), 'module.yaml');
    }

    // If not found in src/modules or custom paths, search the project
    if (!(await fs.pathExists(installerConfigPath)) && !(await fs.pathExists(moduleConfigPath))) {
      // Use the module manager to find the module source
      const { ModuleManager } = require('../modules/manager');
      const moduleManager = new ModuleManager();
      const moduleSourcePath = await moduleManager.findModuleSource(moduleName);

      if (moduleSourcePath) {
        installerConfigPath = path.join(moduleSourcePath, '_module-installer', 'module.yaml');
        moduleConfigPath = path.join(moduleSourcePath, 'module.yaml');
      }
    }

    let configPath = null;
    if (await fs.pathExists(moduleConfigPath)) {
      configPath = moduleConfigPath;
    } else if (await fs.pathExists(installerConfigPath)) {
      configPath = installerConfigPath;
    } else {
      // No config for this module
      return;
    }

    const configContent = await fs.readFile(configPath, 'utf8');
    const moduleConfig = yaml.load(configContent);

    if (!moduleConfig) {
      return;
    }

    // Process each config item
    const questions = [];
    const configKeys = Object.keys(moduleConfig).filter((key) => key !== 'prompt');

    for (const key of configKeys) {
      const item = moduleConfig[key];

      // Skip if not a config object
      if (!item || typeof item !== 'object' || !item.prompt) {
        continue;
      }

      const question = await this.buildQuestion(moduleName, key, item, moduleConfig);
      if (question) {
        questions.push(question);
      }
    }

    // Display appropriate header based on whether there are questions
    if (questions.length > 0) {
      CLIUtils.displayModuleConfigHeader(moduleName, moduleConfig.header, moduleConfig.subheader);
      console.log(); // Line break before questions
      const answers = await inquirer.prompt(questions);

      // Store answers for cross-referencing
      Object.assign(this.allAnswers, answers);

      // Process answers and build result values
      for (const key of Object.keys(answers)) {
        const originalKey = key.replace(`${moduleName}_`, '');
        const item = moduleConfig[originalKey];
        const value = answers[key];

        // Build the result using the template
        let result;

        // For arrays (multi-select), handle differently
        if (Array.isArray(value)) {
          // If there's a result template and it's a string, don't use it for arrays
          // Just use the array value directly
          result = value;
        } else if (item.result) {
          result = item.result;

          // Replace placeholders only for strings
          if (typeof result === 'string' && value !== undefined) {
            // Replace {value} with the actual value
            if (typeof value === 'string') {
              result = result.replace('{value}', value);
            } else if (typeof value === 'boolean' || typeof value === 'number') {
              // For boolean and number values, if result is just "{value}", use the raw value
              if (result === '{value}') {
                result = value;
              } else {
                // Otherwise replace in the string
                result = result.replace('{value}', value);
              }
            } else {
              // For non-string values, use directly
              result = value;
            }

            // Only do further replacements if result is still a string
            if (typeof result === 'string') {
              // Replace references to other config values
              result = result.replaceAll(/{([^}]+)}/g, (match, configKey) => {
                // Check if it's a special placeholder
                if (configKey === 'project-root') {
                  return '{project-root}';
                }

                // Skip if it's the 'value' placeholder we already handled
                if (configKey === 'value') {
                  return match;
                }

                // Look for the config value across all modules
                // First check if it's in the current module's answers
                let configValue = answers[`${moduleName}_${configKey}`];

                // Then check all answers (for cross-module references like outputFolder)
                if (!configValue) {
                  // Try with various module prefixes
                  for (const [answerKey, answerValue] of Object.entries(this.allAnswers)) {
                    if (answerKey.endsWith(`_${configKey}`)) {
                      configValue = answerValue;
                      break;
                    }
                  }
                }

                // Check in already collected config
                if (!configValue) {
                  for (const mod of Object.keys(this.collectedConfig)) {
                    if (mod !== '_meta' && this.collectedConfig[mod] && this.collectedConfig[mod][configKey]) {
                      configValue = this.collectedConfig[mod][configKey];
                      // Extract just the value part if it's a result template
                      if (typeof configValue === 'string' && configValue.includes('{project-root}/')) {
                        configValue = configValue.replace('{project-root}/', '');
                      }
                      break;
                    }
                  }
                }

                return configValue || match;
              });
            }
          }
        } else {
          // No result template, use value directly
          result = value;
        }

        // Store only the result value (no prompts, defaults, examples, etc.)
        if (!this.collectedConfig[moduleName]) {
          this.collectedConfig[moduleName] = {};
        }
        this.collectedConfig[moduleName][originalKey] = result;
      }

      // No longer display completion boxes - keep output clean
    } else {
      // No questions for this module - show completion message
      CLIUtils.displayModuleNoConfig(moduleName, moduleConfig.header, moduleConfig.subheader);
    }
  }

  /**
   * Replace placeholders in a string with collected config values
   * @param {string} str - String with placeholders
   * @param {string} currentModule - Current module name (to look up defaults in same module)
   * @param {Object} moduleConfig - Current module's config schema (to look up defaults)
   * @returns {string} String with placeholders replaced
   */
  replacePlaceholders(str, currentModule = null, moduleConfig = null) {
    if (typeof str !== 'string') {
      return str;
    }

    return str.replaceAll(/{([^}]+)}/g, (match, configKey) => {
      // Preserve special placeholders
      if (configKey === 'project-root' || configKey === 'value' || configKey === 'directory_name') {
        return match;
      }

      // Look for the config value in allAnswers (already answered questions)
      let configValue = this.allAnswers[configKey] || this.allAnswers[`core_${configKey}`];

      // Check in already collected config
      if (!configValue) {
        for (const mod of Object.keys(this.collectedConfig)) {
          if (mod !== '_meta' && this.collectedConfig[mod] && this.collectedConfig[mod][configKey]) {
            configValue = this.collectedConfig[mod][configKey];
            // Remove {project-root}/ prefix if present for cleaner display
            if (typeof configValue === 'string' && configValue.includes('{project-root}/')) {
              configValue = configValue.replace('{project-root}/', '');
            }
            break;
          }
        }
      }

      // If still not found and we're in the same module, use the default from the config schema
      if (!configValue && currentModule && moduleConfig && moduleConfig[configKey]) {
        const referencedItem = moduleConfig[configKey];
        if (referencedItem && referencedItem.default !== undefined) {
          configValue = referencedItem.default;
        }
      }

      return configValue || match;
    });
  }

  /**
   * Build an inquirer question from a config item
   * @param {string} moduleName - Module name
   * @param {string} key - Config key
   * @param {Object} item - Config item definition
   * @param {Object} moduleConfig - Full module config schema (for resolving defaults)
   */
  async buildQuestion(moduleName, key, item, moduleConfig = null) {
    const questionName = `${moduleName}_${key}`;

    // Check for existing value
    let existingValue = null;
    if (this.existingConfig && this.existingConfig[moduleName]) {
      existingValue = this.existingConfig[moduleName][key];

      // Clean up existing value - remove {project-root}/ prefix if present
      // This prevents duplication when the result template adds it back
      if (typeof existingValue === 'string' && existingValue.startsWith('{project-root}/')) {
        existingValue = existingValue.replace('{project-root}/', '');
      }
    }

    // Special handling for bmad_folder: detect existing folder name
    if (moduleName === 'core' && key === 'bmad_folder' && !existingValue && this.currentProjectDir) {
      // Try to detect the existing BMAD folder name
      const detectedFolder = await this.detectExistingBmadFolder(this.currentProjectDir);
      if (detectedFolder) {
        existingValue = detectedFolder;
      }
    }

    // Special handling for user_name: default to system user
    if (moduleName === 'core' && key === 'user_name' && !existingValue) {
      item.default = this.getDefaultUsername();
    }

    // Determine question type and default value
    let questionType = 'input';
    let defaultValue = item.default;
    let choices = null;

    // Check if default contains references to other fields in the same module
    const hasSameModuleReference = typeof defaultValue === 'string' && defaultValue.match(/{([^}]+)}/);
    let dynamicDefault = false;

    // Replace placeholders in default value with collected config values
    if (typeof defaultValue === 'string') {
      if (defaultValue.includes('{directory_name}') && this.currentProjectDir) {
        const dirName = path.basename(this.currentProjectDir);
        defaultValue = defaultValue.replaceAll('{directory_name}', dirName);
      }

      // Check if this references another field in the same module (for dynamic defaults)
      if (hasSameModuleReference && moduleConfig) {
        const matches = defaultValue.match(/{([^}]+)}/g);
        if (matches) {
          for (const match of matches) {
            const fieldName = match.slice(1, -1); // Remove { }
            // Check if this field exists in the same module config
            if (moduleConfig[fieldName]) {
              dynamicDefault = true;
              break;
            }
          }
        }
      }

      // If not dynamic, replace placeholders now
      if (!dynamicDefault) {
        defaultValue = this.replacePlaceholders(defaultValue, moduleName, moduleConfig);
      }

      // Strip {project-root}/ from defaults since it will be added back by result template
      // This makes the display cleaner and user input simpler
      if (defaultValue.includes('{project-root}/')) {
        defaultValue = defaultValue.replace('{project-root}/', '');
      }
    }

    // Handle different question types
    if (item['single-select']) {
      questionType = 'list';
      choices = item['single-select'].map((choice) => {
        // If choice is an object with label and value
        if (typeof choice === 'object' && choice.label && choice.value !== undefined) {
          return {
            name: choice.label,
            value: choice.value,
          };
        }
        // Otherwise it's a simple string choice
        return {
          name: choice,
          value: choice,
        };
      });
      if (existingValue) {
        defaultValue = existingValue;
      }
    } else if (item['multi-select']) {
      questionType = 'checkbox';
      choices = item['multi-select'].map((choice) => {
        // If choice is an object with label and value
        if (typeof choice === 'object' && choice.label && choice.value !== undefined) {
          return {
            name: choice.label,
            value: choice.value,
            checked: existingValue
              ? existingValue.includes(choice.value)
              : item.default && Array.isArray(item.default)
                ? item.default.includes(choice.value)
                : false,
          };
        }
        // Otherwise it's a simple string choice
        return {
          name: choice,
          value: choice,
          checked: existingValue
            ? existingValue.includes(choice)
            : item.default && Array.isArray(item.default)
              ? item.default.includes(choice)
              : false,
        };
      });
    } else if (typeof defaultValue === 'boolean') {
      questionType = 'confirm';
    }

    // Build the prompt message
    let message = '';

    // Handle array prompts for multi-line messages
    if (Array.isArray(item.prompt)) {
      message = item.prompt.join('\n');
    } else {
      message = item.prompt;
    }

    // Replace placeholders in prompt message with collected config values
    if (typeof message === 'string') {
      message = this.replacePlaceholders(message, moduleName, moduleConfig);
    }

    // Add current value indicator for existing configs
    if (existingValue !== null && existingValue !== undefined) {
      if (typeof existingValue === 'boolean') {
        message += chalk.dim(` (current: ${existingValue ? 'true' : 'false'})`);
      } else if (Array.isArray(existingValue)) {
        message += chalk.dim(` (current: ${existingValue.join(', ')})`);
      } else if (questionType !== 'list') {
        // Show the cleaned value (without {project-root}/) for display
        message += chalk.dim(` (current: ${existingValue})`);
      }
    } else if (item.example && questionType === 'input') {
      // Show example for input fields
      let exampleText = typeof item.example === 'string' ? item.example : JSON.stringify(item.example);
      // Replace placeholders in example
      if (typeof exampleText === 'string') {
        exampleText = this.replacePlaceholders(exampleText, moduleName, moduleConfig);
        exampleText = exampleText.replace('{project-root}/', '');
      }
      message += chalk.dim(` (e.g., ${exampleText})`);
    }

    // Build the question object
    const question = {
      type: questionType,
      name: questionName,
      message: message,
    };

    // Set default - if it's dynamic, use a function that inquirer will evaluate with current answers
    // But if we have an existing value, always use that instead
    if (existingValue !== null && existingValue !== undefined && questionType !== 'list') {
      question.default = existingValue;
    } else if (dynamicDefault && typeof item.default === 'string') {
      const originalDefault = item.default;
      question.default = (answers) => {
        // Replace placeholders using answers from previous questions in the same batch
        let resolved = originalDefault;
        resolved = resolved.replaceAll(/{([^}]+)}/g, (match, fieldName) => {
          // Look for the answer in the current batch (prefixed with module name)
          const answerKey = `${moduleName}_${fieldName}`;
          if (answers[answerKey] !== undefined) {
            return answers[answerKey];
          }
          // Fall back to collected config
          return this.collectedConfig[moduleName]?.[fieldName] || match;
        });
        // Strip {project-root}/ for cleaner display
        if (resolved.includes('{project-root}/')) {
          resolved = resolved.replace('{project-root}/', '');
        }
        return resolved;
      };
    } else {
      question.default = defaultValue;
    }

    // Add choices for select types
    if (choices) {
      question.choices = choices;
    }

    // Add validation for input fields
    if (questionType === 'input') {
      question.validate = (input) => {
        if (!input && item.required) {
          return 'This field is required';
        }
        // Validate against regex pattern if provided
        if (input && item.regex) {
          const regex = new RegExp(item.regex);
          if (!regex.test(input)) {
            return `Invalid format. Must match pattern: ${item.regex}`;
          }
        }
        return true;
      };
    }

    // Add validation for checkbox (multi-select) fields
    if (questionType === 'checkbox' && item.required) {
      question.validate = (answers) => {
        if (!answers || answers.length === 0) {
          return 'At least one option must be selected';
        }
        return true;
      };
    }

    return question;
  }

  /**
   * Deep merge two objects
   * @param {Object} target - Target object
   * @param {Object} source - Source object
   */
  deepMerge(target, source) {
    const result = { ...target };

    for (const key in source) {
      if (source[key] && typeof source[key] === 'object' && !Array.isArray(source[key])) {
        if (result[key] && typeof result[key] === 'object' && !Array.isArray(result[key])) {
          result[key] = this.deepMerge(result[key], source[key]);
        } else {
          result[key] = source[key];
        }
      } else {
        result[key] = source[key];
      }
    }

    return result;
  }
}

module.exports = { ConfigCollector };
